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POinsert millions of records into two mysql tables
 

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  1. POinsert millions of records into two mysql tables
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    <p>I have 5 tables with me each with millions of lines in each table. </p> <p>Each table has same format i.e. email, ip address, location. A single email address can be present in any of the five tables or in all of the 5 tables. And there are two other tables namely <code>User_ip</code> and <code>User_location</code>. </p> <p>I want to store unique ip adress of each email address in User_ip table, and distinct location of each email address in user_location table.</p> <p>Currently, I have been following this procedure but this is taking alot of time. Is there any other solution or method???</p> <pre><code>Statement stmt = connection.createStatement(); stmt.executeUpdate("insert into temp(email,ip,location) select email,ip,location from Apr_web group by email,ip"); stmt.executeUpdate("insert into temp(email,ip,location) select email,ip,location from Apr_gov group by email,ip"); stmt.executeUpdate("insert into temp(email,ip,location) select email,ip,location from Apr_mail group by email,ip"); stmt.executeUpdate("insert into temp(email,ip,location) select email,ip,location from Apr_pop group by email,ip"); stmt.executeUpdate("insert into temp(email,ip,location) select email,ip,location from Apr_imap group by email,ip"); stmt1 = connection.createStatement(); stmt1.executeQuery("select distinct email from temp"); ResultSet rs = stmt1.getResultSet(); while(rs.next()){ Statement stmt2 = connection.createStatement(); stmt2.executeQuery("select distinct substring_index(ip,'.',2) from temp where email='"+email+"'"); ResultSet rs2 = stmt2.getResultSet(); while(rs2.next()`enter code here`){ ip=rs2.getString(1); Statement stmt3 = connection.createStatement(); Statement stmt4 = connection.createStatement(); stmt3.executeQuery("select * from user_ip where uid='"+email+"' and ip='"+ip+"'"); ResultSet rs3 = stmt3.getResultSet(); if(rs3.next()){ System.out.println("THE ROW ALREADY EXISTS IN IP TABLE"); } else{ stmt4.executeUpdate("insert into user_ip(uid,ip) values('"+email+"','"+ip+"')"); System.out.println("ROW INSERTED IN USER_IP"); } } Statement stmt5 = connection.createStatement(); stmt5.executeQuery("select distinct location from temp where email='"+email+"' and location !='no information found'"); ResultSet rs4 = stmt5.getResultSet(); while(rs4.next()){ location = rs4.getString(1); //Statement stmt6 = connection.createStatement(); //Statement stmt7 = connection.createStatement(); pst1 = connection.prepareStatement("select * from user_location where uid=? and location=?"); pst1.setString(1, email); pst1.setString(2, location); ResultSet rs5 = pst1.executeQuery(); if(rs5.next()){ System.out.println("THE ROW ALREADY EXISTS IN USER_LOCATION"); } else{ pst2 = connection.prepareStatement("insert into user_location(uid,location) values(?,?)"); pst2.setString(1,email); pst2.setString(2,location); pst2.executeUpdate(); System.out.println("ROW INSERTED IN USER_LOCATION"); } } } </code></pre>
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    1. USJayan
    1. USanonymous
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    1. COUse powerful machine, split task into multiple threads and use batch when using jdbc.
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      1. USJayan
    2. COWhat have you done to measure *what* causes the delay? Which part of your program takes the most time? How many rows total are in the 5 source tables; Do you mind losing the IP<->Location association? Do the user_location and user_ip tables already have data?
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      1. USTassos Bassoukos
    3. CO@Tassos Bassoukos the insertion in the table User_ip and User_location is taking time. i am combining the 5 tables in table temp which has approx 1,24,00000 for the data of one month. and i want unique ip and unique location for each user so the assosiation does not matters that much. and i will do this procedure for 4 months, so i wanted to do it month wise. so after month both tables will be having data so i have to chck whether the ip and location exists or not..
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      1. USanonymous
 

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